[HELP] Shrink Clip without aliasing

[Selur]

Is there any other Resize Method i can maybe use without some details get blur /unsharp?

When downscaling some details need to go since you lower the amount of pixels.
So: No

Also, unless you use some anime descaling method, I would never use bilinear and I usually wouldn't use bicubic either.
SplineResizing is usually a good approach when not doing specific resizing.

That said, using Frame->Resize->Resizer->fmtconv and switching through the different resizers while having the preview (with auto refresh) open should easily allow seeing the effect of different resizers on you sepecific content.

In general, I also would recommend to use denoising before any resizing, otherwise the resizing will change the nature of the noise.

Cu Selur

Ps.: if you sure you want no aliasing&co you could always use nearest neighbor / point resize.